BEHRINGER EUROPOWER EPQ900 2 x 390 Watts into 4 Ohms; 2 x 245 Watts into 8 Ohms ATR (Accelerated Transient Response) technology for ultimate punch and clarity Ultra-light, ultra-low noise and ultra-efficient switch-mode power supply for noise-free audio, superior transient response and low power consumption Independent limiters for each channel offer maximum output level with reliable overload protection Detented gain controls for precise setting and matching of sensitivity 2 x 390 Watts into 4 Ohms, 2 x 245 Watts into 8 Ohms ATR (Accelerated Transient Response) technology for ultimate punch and clarity Ultra-light, ultra-low noise and ultra-efficient switch-mode power supply for noise-free audio, superior transient response and low power consumption Back-to-front ventilation system including air filter for reliable operation Built-like-a-tank, impact-resistant and all-steel 1U rack-mount chassis